32     float x;  member
35     float lengthSquared() const { return x * x + y * y; }  in lengthSquared()
37     float length() const { return sqrt(x * x + y * y); }  in length()
40         x += v.x;
45         x -= v.x;
50         x += v;
55         x -= v;
60         x /= s;
65         x *= s;
69     Vector2 operator+(const Vector2& v) const { return (Vector2){x + v.x, y + v.y}; }
71     Vector2 operator-(const Vector2& v) const { return (Vector2){x - v.x, y - v.y}; }
73     Vector2 operator/(float s) const { return (Vector2){x / s, y / s}; }
75     Vector2 operator*(float s) const { return (Vector2){x * s, y * s}; }
79         x *= s;  in normalize()
84         Vector2 v = {x, y};  in copyNormalized()
89     float dot(const Vector2& v) const { return x * v.x + y * v.y; }  in dot()
91     float cross(const Vector2& v) const { return x * v.y - y * v.x; }  in cross()
93     void dump() { ALOGD("Vector2[%.2f, %.2f]", x, y); }  in dump()
99     float x;
103     Vector3 operator+(const Vector3& v) const { return (Vector3){x + v.x, y + v.y, z + v.z}; }
105     Vector3 operator-(const Vector3& v) const { return (Vector3){x - v.x, y - v.y, z - v.z}; }
107     Vector3 operator/(float s) const { return (Vector3){x / s, y / s, z / s}; }
109     Vector3 operator*(float s) const { return (Vector3){x * s, y * s, z * s}; }
112         ALOGD("%s[%.2f, %.2f, %.2f]", label, x, y, z);